Fix time values of cluster provision steps

This patch fixes time values of cluster provision steps according to
timezone in dashboard settings.

Change-Id: Ibe5574b5577f4d792dd2829662881c4d90c44436
closes-bug: 1563419

requirements.txt

@@ -14,3 +14,4 @@ python-manilaclient>=1.3.0 # Apache-2.0
 python-neutronclient!=4.1.0,>=2.6.0 # Apache-2.0
 python-novaclient!=2.33.0,>=2.29.0 # Apache-2.0
 python-saharaclient>=0.13.0 # Apache-2.0
+pytz>=2013.6 # MIT

sahara_dashboard/content/data_processing/clusters/clusters/views.py

@@ -144,7 +144,8 @@ class ClusterEventsView(django_base.View):
                 step["duration"] = time_helpers.get_duration(
                     step["created_at"],
                     step["updated_at"])
-
+                step['started_at'] = time_helpers.to_time_zone(
+                    step["created_at"], localize=True)
                 result = _("In progress")
                 step["completed"] = successful_events_count
 

sahara_dashboard/content/data_processing/static/dashboard/project/data_processing/data_processing.event_log.js

@@ -44,7 +44,7 @@ horizon.event_log = {
             "</tr>";
 
 
-        var started_at = new Date(step.created_at).toString();
+        var started_at = step.started_at;
         var progress = "" + step.completed + " / " + step.total;
         var description = step.step_type + "<br />" + step.step_name;
 

sahara_dashboard/content/data_processing/utils/helpers.py

@@ -11,9 +11,13 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from pytz import timezone as ptz
+import six
+
+from django.template import defaultfilters as filters
+from django.utils import timezone
 from django.utils.translation import ugettext_lazy as _
 from oslo_utils import timeutils
-import six
 
 import sahara_dashboard.content.data_processing. \
     utils.workflow_helpers as work_helpers
@@ -130,7 +134,7 @@ class Helpers(object):
         The end time may be skipped. In this case datetime.now() will be used.
 
         :param start_time: Start timestamp.
-        :param end_time: End timestamp. Optional.
+        :param end_time: (optional) End timestamp.
         :return: The delta between timestamps.
         """
 
@@ -144,6 +148,34 @@ class Helpers(object):
 
         return six.text_type(end_datetime - start_datetime)
 
+    def to_time_zone(self, datetime, tzone=None,
+                     input_fmt=None, localize=False):
+        """Changes given datetime string into given timezone
+
+        :param datetime: datetime string
+        :param tzone: (optional) timezone as a string (e.g. "Europe/Paris"),
+               by default it's the current django timezone
+        :param input_fmt: (optional) format of datetime param, if None then
+               the default Sahara API format (%Y-%m-%dT%H:%M:%S) will be used
+        :param localize: (optional) if True then format of datetime will be
+               localized according to current timezone else it will be in
+               the default Sahara API format (%Y-%m-%dT%H:%M:%S)
+        :return datetime string in the current django timezone
+        """
+
+        default_fmt = '%Y-%m-%dT%H:%M:%S'
+        if tzone is None:
+            tzone = self.request.session.get('django_timezone', 'UTC')
+        if input_fmt is None:
+            input_fmt = default_fmt
+        dt_in_utc = timezone.utc.localize(
+            timeutils.parse_strtime(datetime, input_fmt))
+        dt_in_zone = dt_in_utc.astimezone(ptz(tzone))
+        if localize:
+            return filters.date(dt_in_zone, "DATETIME_FORMAT")
+        else:
+            return dt_in_zone.strftime(default_fmt)
+
 
 # Map needed because switchable fields need lower case
 # and our server is expecting upper case.  We will be